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Collection
297,080
Electronic Access
143,532
Gov Pub Electronic
141,534
Main Books 3rd Floor
75,599
Gov Pub Microfiche
58,836
Storage Gov Pub
24,403
CO Gov Pub Electronic
more ...
12,202
Audio and Visual 1st Floor
8,067
Storage Books
7,423
Storage Folded Maps
6,901
Spec Coll 3rd Floor
6,126
Microfilm 2nd Floor
5,388
Juv Coll 2nd Floor
3,316
Ref Coll 1st Floor
3,109
New Books 1st Floor
2,028
Spec Coll Energy 3rd Floor
1,846
Storage Flat Maps
1,825
Flat Maps 2nd Floor
1,539
Oversize 3rd Floor
1,377
Reserve 1st Floor
1,298
Storage Periodicals
1,193
Storage Gov Pub Media
822
Gov Pub Ref 1st Floor
474
Storage Microfiche
420
Bestsellers 1st Floor
386
Periodicals
308
Storage Colo Doc
88
Microfiche 2nd Floor
66
Ref Oversize 1st Floor
57
Spec Coll Oversize 3rd Floor
56
Special Coll Rare Books
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Format
262,361
Book
257,782
eBook
145,750
Electronic
40,155
Microfilm
36,466
Video
18,752
Map
more ...
11,466
Unknown
7,784
Serial
6,403
CD
4,666
Text
4,385
Musical Score
4,242
Record
2,558
Journal
2,165
DVD
1,042
VHS
788
Audio
672
Photo
664
Software
263
Manuscript
259
Image
184
Slide
141
StillImage
115
Cassette
33
Still Image
24
Blu-ray Disc
19
Kit
19
Text; Still Image
17
Brochure
16
Sensor Image
13
Physical Object
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Subject
14,223
Geology
9,212
Appropriations and expenditures
6,576
Rules and practice
6,467
Management
5,233
United States Foreign relations
4,784
Mines and mineral resources
more ...
4,669
Groundwater
4,352
Geology, Stratigraphic
4,313
Water quality
4,272
History
4,178
Artificial intelligence
4,171
Officials and employees
4,061
Economics
3,387
Health
3,215
Business
3,108
Water-supply
2,970
United States Politics and government
2,881
Criticism and interpretation
2,808
United States History
2,683
Computer security
2,680
Auditing
2,673
National security
2,530
Evaluation
2,273
Operas
2,119
Mathematics
2,079
Entrepreneurship
2,043
United States
2,019
Selection and appointment
2,018
Computer science
1,813
Aquifers
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Author
111,467
SpringerLink (Online service)
39,910
ScienceDirect (Online service)
30,544
Geological Survey (U.S.)
25,644
Infobase,
18,125
Geological Survey (U.S.),
15,222
Literature Online (Online Service)
more ...
12,607
Oxford Scholarship Online
11,840
Films for the Humanities & Sciences (Firm)
11,798
Infobase
10,310
Library of Congress. Congressional Research Service,
7,447
EBSCOhost
3,972
United States,
3,388
United States. Bureau of Mines
2,564
Educational Resources Information Center (U.S.)
2,507
National Renewable Energy Laboratory (U.S.),
2,458
Law Library of Congress (U.S.). Global Legal Research Directorate,
2,428
United States. Congress. House. Committee on Rules
2,337
U.S. Fish and Wildlife Service
2,205
United States. National Park Service
2,130
United States. Bureau of Land Management
2,123
Prendismo, LLC (Firm)
2,065
ProQuest (Firm)
2,024
United States. Congress. Senate. Committee on Energy and Natural Resources
1,830
United States. Forest Service
1,778
Colorado State University. Cooperative Extension Service
1,697
United States. Environmental Protection Agency
1,687
National Renewable Energy Laboratory (U.S.)
1,646
Public Broadcasting Service (U.S.)
1,529
United States. Bureau of the Census
1,475
United States. Congress. House. Committee on the Judiciary
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Language
786,130
English
8,783
Spanish
7,226
No linguistic content
5,654
German
5,528
French
4,996
eng
more ...
3,642
Italian
1,749
Russian
1,079
Undetermined
825
Latin
724
Chinese
562
Japanese
384
Portuguese
276
Ancient Greek
258
Multiple
233
Dutch
226
Arabic
221
Polish
184
Swedish
157
Greek
145
Hebrew
140
Czech
135
Korean
123
Norwegian
121
Hungarian
111
Danish
85
Vietnamese
47
Romanian
43
Tagalog
43
Turkish
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Genre
35,701
Conference papers and proceedings
32,918
Fiction
28,538
Sound recordings
26,068
Video recordings
23,310
Internet videos
21,919
Maps
more ...
16,951
Dictionaries
14,414
Periodicals
13,575
Legislative hearings
13,269
Biographies
12,921
Statistics
11,804
Handbooks and manuals
10,572
Bibliographies
8,957
Legislative materials
6,913
Technical reports
3,732
Congresses
3,635
Scores
3,599
Case studies
3,327
Topographic maps
3,056
Autobiographies
2,970
Operas
2,752
Drama
2,695
Statutes and codes
2,673
Instructional television programs
2,660
Excerpts
2,580
Treaties
2,447
Catalogs
2,209
Literature
1,809
Illustrated works
1,598
Directories
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Literary Form
Era
10,877
20th century
5,175
19th century
2,703
21st century
1,579
18th century
1,014
1564-1616
989
Civil War, 1861-1865
more ...
969
17th century
890
1945-
838
Cretaceous
748
1945-1989
588
16th century
553
1933-1945
519
Revolution, 1775-1783
489
1946-
484
1989-
447
Tertiary
435
To 1500
417
Quaternary
408
2009-
388
2001-2009
385
Early modern, 1500-1700
372
Colonial period, ca. 1600-1775
348
1991-
346
Precambrian
334
Paleozoic
293
Cenozoic
279
1960-
273
1951-
260
2000-
252
1929
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Region
185,952
United States
28,706
Colorado
8,643
California
7,141
Great Britain
5,253
China
5,241
Alaska
more ...
3,879
Europe
3,864
New Mexico
3,851
Utah
3,599
Arizona
3,355
Nevada
3,217
West (U.S.)
3,171
Texas
2,966
Wyoming
2,945
Montana
2,927
Oregon
2,848
Washington (State)
2,713
New York (State)
2,479
Florida
2,359
Idaho
2,331
Japan
2,246
India
2,124
Mexico
2,047
England
2,041
France
1,970
Germany
1,842
North America
1,749
Washington (D.C.)
1,698
Pennsylvania
1,643
Canada
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Call Number
93,571
Q - Science
64,167
H - Social Science
59,964
T - Technology
50,760
K - Law
43,162
P - Language and Literature
38,916
R - Medicine
more ...
36,364
E - United States History
31,707
L - Education
23,482
G - Geography, Anthropology, Recreation
18,572
D - World History
18,069
M - Music
16,591
A - General Works
15,827
B - Philosophy, Psychology, Religion
14,126
F - General American History
13,414
S - Agriculture
12,345
C - Historical Sciences
12,238
J - Political Science
10,344
N - Fine Arts
3,499
Z - Library Science
2,217
U - Military Science
1,951
V - Naval Science
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Year of Publication